Mankind were but one community (i.e. on one religion - Islamic Monotheism), then they differed (later), and had not it been for a Word that went forth before from your Lord, it would have been settled between them regarding what they differed.
सारे मनुष्य एक ही समुदाय थे। वे तो स्वयं अलग-अलग हो रहे। और यदि तेरे रब की ओर से पहले ही एक बात निश्चित न हो गई होती, तो उनके बीच का फ़ैसला कर दिया जाता जिसमें वे मतभेद कर रहे हैं